Preparation And Study On High Sulfur Capacity Properties Of Mesoporous Sorbents On High Temperature

To reduce costs and apply to the requirements of industrial application, severalMCM-41materials were synthesized at different conditions by hydrothermalprocedure using cheap and easily available industrial water glass as silica source. Fedoped manganese-based oxide/MCM-41sorbents were prepared by a sol-gel method.The effects of loadings of metal oxide, Fe/Mn molar ratios over MCM-41andreaction temperature on the performance of sorbent for hot coal gas desulfurizationwere investigated. Various techniques such as BET, XRD, LRS and HRTEM wereused to characterize the sorbents. The Fe dopant could greatly enhance the sulfurcapacity of Mn-based sorbent because Fe3+ions occupied a position of Mn3+in cubiclattice of Mn2O3and the mainly active phase of sorbent converted to (FexMn2-x)O3.The breakthrough sulfur capacity of45%FexMnyOz/MCM-41(Fe:Mn=1:4) was15.5g sulfur/100g sorbent, which was86.7%of the theoretical sulfur capacity. The resultsof nine successive sulfurization-regeneration cycles of sorbent showed high sulfuradsorption capacity and endurable stability of FeMn4Ox/MCM-41for H2S removal.In view of the excellent sulfur adsorption capacity and the relatively low cost ofproduction, the optimal sorbent was synthesized largely. The preparation of thealumina sol as a binder, and the sorbent was adhered, extruded and used for amplifyexperiment. The breakthrough sulfur capacity can still maintain9.9g sulfur/100gsorbent and endurable stability.